Electromagnetic valve.



J. McL. KINGSBURY.

ELECTROMAGNETIC VALVE.

APPLICATION FILED FEB. Q, I9I8.

1,270, 1 70. Patented June 18, 1918.

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INVEN R.

WITNESS 2 1 8 J 2 gym UNITED STATES PATENT OFFICE.

JOHN MOLEAN KINGSBUEY, OF NEW YORK, N. Y.

ELECTROMAGNETIC VALVE.

Specification of Letters Patent.

Application filed February 4, 1918. Serial No. 215,848.

To all whom it may concern:

Be it known that I, JOHN MCLEAN Knees- BURY, a citizen of the UnitedStates, resid ing at 321 West 94th street, New York, in the county ofNew York and State of New York, have invented a new and usefulElectromagnetic Valve, of which the following is a specification.

My invention relates to improvements in electromagnetically controlledvalves for controlling the flow of fluids, either liquid or gaseous,under pressure and having the features herein shown and described. Inmany forms of electromagnetic valves in common use in which movablemembers are actuated by an electromagnet certain operating conditionsobtain which are undesirable. Electromagnetic valves as usuallyconstructed are not selfcontained. The valve proper with itsmultiplicity of packings, stufiing boxes, springs, guides, valve stemand housing with tortuous passages, is usually mounted below theoperating magnet and attached to its frame.

Such construction necessitates the use of some form of'push or pull rod,or a more complicated system of levers to transmit the pull of thearmature to the operating valve stem. In other words it is commercialpractioe to take two complete and radically different devices, one of apurely electrical nature, the operating magnet; the other of a purelymechanical nature, the valve; attach the frame of one to the body of theother and interpose some form of operating means as indicated above.

We are familiar with the shortcomings of valves as ordinarilyconstructed, springs oxidize and obtain a permanent set, rubber valvebulbs and gaskets rapidly deteriorate and become leaky and stufiingboxes bind and impose undue friction. My device will not be subject tosuch troubles as allof the above parts are eliminated from itsconstruction.

It will be noted that I have adapted the extremely simple design of theelectromagnet to form a purely self contained electromagnetic valve,without requiring any additional parts in its construction. By causingthe fluid to flow through the core opening in the winding, and ifdesired by making the magnet frame with jacket chambers, the fluid flowcan be directed about the winding also, I thus obtain additionalradiating means for dissipating the heat generated by the current in thewinding.

It is well known in the art that the armature of an alternating currentmagnet will vibrate and chatter and that this can be prevented inseveral ways, one of which is to embed a copper damper in the armatureadjacent to the air gap. In my valve this chattering and vibrating ofthe armature is prevented by the flow and pressure of the fluid in whichit is submerged and surrounded.

My invention will best be understood in connection with the accompanyingdrawings, in which merely for purposes of illustration I have shown twoforms in which my invention may be embodied and in which,

Figure 1 shows an elevation and partial section of one form of myelectromagnetic valve.

Fig. 2 shows a modified form in elevation and partial section of myelectromagnetic valve with a'water'jacketed frame.

Corresponding parts have the same numbers in both Figs. 1 and 2.

In the particular'form of device shown in Fig. 1, an electromagnet frame1 is drilled and threaded to receive the armature stop 2, which is heldin position b locknut 3.

Supply pipe 4 is attached to the upper threaded end, and the tube 5 tothe lower threaded end of stop 2. I provide a pas which forms the valvechamber 7. The

lower end of tube 5 is threaded to receive the valve seat 8 and outletconnection 9. The armature 10 is loosel inclosed within the tube 5,thereby provi ing a free opening around it for the How of the fluid inwhich it is thus submerged. The armature 10 rests upon the sphericalarmature ball 11 of magnetic material. I have used the term armatureball for the reason, that from a magnetic standpoint this ball formspart of, andcooperates with 1 0 to make up the complete armature of themagnet. Armature ball 11 rests in turn upon valve seat 8 which is ofnonmagnetic material. The upper surface of valve seat 8 may be depressedsubstantially as shown, so that the armature ball is directed toward itsground seat at the upper end of opening 12, and held in place upon saidground seat by its own weight and also the weight of 10, as well as bythe pressure of the fluid thereon. The lower surface of armature 10 isat right angles to the longitudinal axis and is made smooth so that thearmature ball 11 is free to roll thereon in finding its ground seatabout opening- 12.

Although preferable for mechanical reasons, it is not necessary that,'to the broadest aspect of my improvement, the armature be constructedin two parts. The armature 10 can be made in one piece as shown in Fig.2, with the lower end so shaped as to properly engage the ground seat inthe opening 12 of valve seat 8. It is evident that the two piecearmature l0 and 11 as shown has mechanical advantages, as the ballportion 11 is free to roll to its proper seat while with the one piececonstruction shown in Fig. 2, it must slide to its seat.

Gone 13 is of nonmagnetic material and prevents arma'ture 10 fromsticking to stop 2, due to residual magnetism in these parts.

Fig. 2 shows a modified form of my electromagnetic valve with the frame1, inclosing winding 14, made with cored chambers 15 communicating withopening 6 thus providing means for additional circulation of the fluidabout as well as through the winding to aid in dissipating the heatgenerated by the current in said winding. In Fig. 2 I have shown theonepiece armature 10. Stop 2 and valve seat 8 are threaded and attachedto frame 1.

The operation of my electromagnetic valve is the same as that of theordinary plunger type electromagnet, in which I utilize the plunger orarmature as a valve to control the opening through the valve seat 8, forthe flow of the fluid therethrough.

When an electric current is passed through the winding 14 the armaturel0 and ball 11 attracted thereto is drawn up against stop 2, thusleaving the opening 12 free for the flow of the fluid therethrough.

When the current is cut off the armature returns to its seat and stopsthe flow.

My invention may be embodied in other forms than those shown anddescribed, and I therefore do not limit my invention to the precisearrangement described, except in so far as it is limited by the scope ofthe appended claims.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is 5- 1. An electromagnetic valve comprising an actuating windingand an iron frame which surrounds said winding andforms part of amagnetic circuit therefor, an axial opening through said winding andframe forming a fluid chamber, a loosely fitting armature consisting oftwo parts, one of which is a spherical ball, both parts thereof beingimmersed in the fluid in said chamber and adapted to move freelytherein.

2. An electromagnetic valve comprising an actuating winding, and an ironframe which surrounds said winding and forms part of a magnetic circuittherefor, an axial opening through said winding and frame forming afluid chamber, a loosely fitting armature consisting of two parts, oneof which is a spherical ball, both parts thereof being immersed in thefluid in said chamber and adapted to move freely therein, one part ofthe armature resting on the spherical ball part, said ball part in turnresting on the influent side of a valve seat in said chamber, andadapted to control the flow of fluid through an opening in said valveseat.

3. An electromagnetic valve with an axial opening through its windingand openings through its surrounding iron frame, said openin s formingfluid chambers, the flow of flui through said chambers cooperating withthe lining of said axial opening and body of said'iron frame todissipate the heat generated by the current -in said windin 'In witnesswhereof, I. hereunto subscribe my name this 29 day of J an., A. D. 1918.

J. MCLEAN KINGSBURY.

